Refer to the Information Provided in the Table Below to Answer

Multiple Choice

Refer to the information provided in the table below to answer the following question.
Table 7.3 $$\begin{array} { l l l l l l l } \hline L & 0 & 1 & 2 & 3 & 4 & 5 \\\hline Q & 0 & 10 & 20 & 30 & 40 & 50 \\\hline\end{array}$$
-Refer to Table 7.3. Suppose output varies, ceteris paribus, with labor input in the following manner displayed above. After how many units of labor do diminishing returns set in?

A) 3
B) 4
C) 5
D) They do not set in.